Combined panel-gage



Patented Sept. 7, 1886.

,em-Lummen, mm un.

(No Model.)

P. A. HUMPHRBY.

COMBINED PANELGAGE, MEASURING ROD, AND TRAMMEL. No. 348.674.

. drawings, is a specification sufficiently full,`

UNITED STATES PATENT OEEICE.

FRANK A. HUMPHREY, OF WORCESTER, MASSACHUSETTS.

COMBINED PANEL-GAGE, MEASURING-ROD, AND TRAMMEL.

STPEC'IIEICATION forming part of Letters Patent No. 348,674., datedSeptember 7, 1886.

Application filed April 2l), 1886. Serial No. 200,532. (No model.)

To @ZZ whom, it may concern:

Beit known that I, FRANK A. HUMPHREY, a citizen of the United States,residing at 70rcester, in the county of Vorcester and State ofMassachusetts, have invented certain new and useful Improvements inCombined Panel-I Gage, Measuring-Rod, and Trammel, of which thefollowing, together' with the accompanying clear, and exact to enablepersons skilled in the art to which this invention appertains to makeand use the saine.

The object of my present invention is to provide a convenient,practical, and serviceable panel-gage having an extensible tubular barformed of teleseoping sections and means for retaining` said sections atpositions of adjustment; also, to provide a micrometer-adjusting devicefor the marking tooth or point, as hereinafter explained; also, toprovide a tool or convertible gage which can be used as a measuring-rod,when desired, also as a trammel for laying out cireles,and one which canbe manufactured with facility and economy. These objects I attain by agage tool or instrument constructed as shown in the drawings andexplained in the following description, the particular subject-matterclaimed being hereinafter dehnit'ely specified.

In the drawings, Figure l is a bottom view, on reduced scale, of myimproved panel-gage partially extended. Fig. 2 is a verticallongitudinal section at center line, w w, Fig. 3. Fig. 3 is a transversesection at the position of liuc x w, looking toward the adjustablehead-block; and Fig. 4. is a transverse section at line y y, lookingtoward the tooth-supporting end of the instrument.

In referring to parts, A denotes the bars; B, the sliding headorguard-block; C, the marking-tooth, and Dthe micrometer-adjusting nut.

The bar A consists of a series of tubes or tubular sections, a a a2, ofsuch relative diameters that one section telescopes within another andis therein supported with a smooth sliding fit. Each section may be tcnor twelve inches (more or less) in length, and the rear end of the outertube may be stopped with a plug or disk, a, to prevent the entrance ofdirt. The front ends of the overlying tubes a a are longitudinallyslitted fora short distance, as at f, and are externally screw threaded,either straight or slightly tapering, to receive the internally taperedand threaded rings or pinchl nuts F F', which serve to compress theslitted ends of the outer tubes or sections about the exterior surfacesof the inner ones for retaining the sections at positions oflongitudinal adjustment'. The exterior' surface of the pinch-nuts ispreferably milled, eh ecked, or corrugated to prevent the nut slippingin the fingers when` clamping the parts.

The tubular sections are severally provided with a longitudinal groove,a, andare confined against rotating with relation to each other by meansof a lug or projection on the outer section fitting into the groove ofthe inner section, and sliding therein as the parts are extended; orthelug may be formed by bending down or setting in a portion of themetal of the tube at its front end. The groove a of the inner tube maybe stopped or not formed com` pletel y to the rear end of the section,as at w, Fig. 2, so that the lug, when it reaches the limit of thegroove, will act as a guard to prevent the sections from separating orwithdrawing one from another when extending the bar to its Afullcapacity.

The tubular sections may, if desired, be fitted together with bcarng-rings or short bearing-surl'aces at or near their ends only, in lieuof the entire incloscd length ofthe tubes being utilized forbearing-surface, one upon the other, as herein shown.

The head B is formed with a hub, I), fitted to slide on the largersection of the bar, and having laterally-extended wings and a transverseguard-lip, b', as indicated. A clampinglever, E, is provided forretaining said head at position of adjustment, which lever may bearranged to operate substantially as described in my specification formarking-gages heretofore filed. (See Serial No. 199,275.)

A hole, b, is formed through thehead to receive and support a pencil,for purposes hereinafter explained.

The horizontal portion of the guard is preferably att-ached forward ofthe hub, so that it will extend beneath the pinch-nuts when the gage isclosed together, as in Fig. 2.

' rhe head B is prevented from rotation on the bar A by a pin or lug,which may be the pivot pin of the cramping-lever, the end whereof runsin the groove a3 of the outer section, on which the head is mounted.

The marking-tooth C is supported in an adjustable carrier, I, which inthe present instance is provided with a lip, z', in line with IOO thehorizontal part of the guard on the head.` (See Fig. 2.) Saidmarking-tooth carrier is furnished with a spindle or shank, l', that eX-tends into the inner section or tube, a, of the bar A, and serves tosupport and guide the carrier,which is arranged to havea limitedmovement under control of the nut D,Which nut is fitted with ascrew-thread to the end of the tube c, and is confined to the carrier lby a pin or lugs, J, fixed in the spindle l', and projecting outwardthrough longitudinal slots formed in the end of the tube and engagingwith the rear end of the nut D or a groove formed therein, so that whenthe nut is turned the action of the screw-thread running it on or offfrom the end of the tube a will effect a slight longitudinal movement ofthe carrier I and marking-tooth, C, in relation to the bar A and head B,for the purposes of micro-adjustment. The top end of the tooth cisextended above the head of the carrier and pointed at c', (or, ifpreferred, a separate tooth or point may be employed at that position,)so that by inverting the instrument and using the said point for acenter, and with a pencil inserted through the hole b2 in the head theinstrument can be used as a trammel for laying out circles and curvedarcs upon the work. Again, in the use of the instrument the bar can beconveniently used as a measuring-rod for taking the dimension of spaces,as a doorway or interior of a box or other similar purposes. This iseffected by loosening the nuts F F then extending the bar A until theends f reach the sides of the space and then clampi ng the parts byscrewing on the nuts F F', after which the instrument can be removed andthe measurement transferred as desired.

The head B can be slipped oft' from the bar when it is used formeasuring, if desired.

The operation of using the instrument for the purpose of a gage will besufficiently understood by any person conversant with marking-gages, sothat a detailed description thereof herein will be unnecessary. The headB is adjusted, as required, and the bar A is extended for all suchdistances as are not Within the scope of the main section.

The advantages of my improvements are that an economical, convenient,and efficient instrument is provided, one in every way desirable andbetter adapted to meet the requirements of the workman, and tofacilitate the accurate and practical laying-off of work of variouskinds.

VhatI claim as of my invention, and desire to secure by Letters Patent,is-

l. A panel-gagehaving a bar which is coinposed of a series of metaltubes adapted for telescoping one within another, and provided withmeans for retaining them severally at positions of longitudinaladjustment, and means for preventing rotation of said tubes one withinanother, combined with an adjustable guard or head block and amarking-tooth, substantially as and for the purpose set forth.

2. A panel-gage having a telescoping sectional bar, an adjustable guardor head, and a marking-tooth supported in a microadjustable carrier,substantially as hereinbefore set forth.

3. The combination of the telescoping tubular sections screw-threadedand slitted at their ends, the internally-tapered thumb-nuts fitted tosaid screw-threaded ends, and the head or guard block B,adjustablymounted on the outer one of said sections, means for retaining said headat positions thereon, and a marking-tooth supported by the inner one ofsaid sections, substantially as and for the purposes set forth.

4. The combination, substantially as described, of the extensible barcomposed of telescoping sections, the clamping-nuts F F on the overlyingends of said sections, the marking-tooth carrier l, adj ustablyconnected to the end of said bar, the markingtooth fitted in saidcarrier, the carrier adjusting-nut D, confining said carrier andscrew-threaded to the bar, the adjustable-head having the guard-lip b,mounted on the outer section of said bar, and the lever E, pivoted onsaid head and adapted for cramping against the bar, for the purposes setforth.

5. A panel-gage having a bar composed of telescoping sections providedwith clamping devices F F at the ends thereof and carrying a point, C',in combi-nation with an adjustable guard-head having a hole, B, formedtherethrough, adapted for supporting a pencil, substantially as and forthe purpose set forth.

6. The combination of the tubular bar having a slotted screw-threadedend, the guardhead adj ustanle on said bar, and means, substantially asdescribed, for securing the parts at positions of adj nstment, themarking-tooth, and a marking-tooth carrier having a spindle or shankextended within said bar, and the rotatable nut fitting onto thescrew-threaded end of the bar and confined to said carrier for effectinglongitudinal adjustment thereof in relation to said bar, substantiallyas set forth.

n7. Vln a gage having an extensible bar and an adjustable head, themarking-tooth C, and the marking-tooth carrier I, having the lip t' andshank l', the rotatable nut l), combined with the threaded and slottedend of said bar, substantially as and for the purpose set forth.

8. The bar A, formed of a series of telcscop ing sections, provided withclamping-nuts F F', combined with an adjustable end piece, l, carrying amarking-tooth, and having a shank, I, telescoping with the end of saidbar, and a rotatable nut for effecting micro-adjustment thereoflongitudinally in relation to said bar, and a removable head or guard,as set forth.

Vtnest my hand this 24th day of April, A. D. 1886.

FRANK A. HUMPHREY. Vitn esses:

CHAs. H. BURLEIGH, S. R. BARTON.

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